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#!/usr/bin/env python
import argparse
import hashlib
import os
import sys
from string import Template
if __name__ == '__main__':
parser = argparse.ArgumentParser(
description="Rename files based on their content.",
formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument('files', metavar='FILE', nargs='+',
help="files to rename")
parser.add_argument('-m', '--mask',
help="file destination mask", default='${hash}.${ext}')
parser.add_argument('-p', '--pretend', action='store_true',
help="do not rename, just print")
args = parser.parse_args()
print "Renaming with mask: %s" % args.mask
mask = Template(args.mask)
for f in args.files:
if not os.path.exists(f):
print >>sys.stderr, "File %s does not exists." % f
else:
with open(f) as fp:
h = hashlib.sha1(fp.read()).hexdigest()
ext = os.path.splitext(f)[1][1:]
name = mask.substitute(hash=h, ext=ext)
dest = os.path.join(os.path.dirname(f), name)
if os.path.basename(f) == name:
print "OK %s" % name
else:
print "`%s' -> `%s'" % (f, dest)
if os.path.exists(dest):
print >>sys.stderr, "Destination %s already exists." % dest
elif not args.pretend:
os.rename(f, dest)
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